Key Benefits

Increased System Availability
By partially moving a valve on a regular basis, the PFD is dramatically reduced without impacting normal process operation

Reduced Testing Costs
Since the partial valve stroke testing can be undertaken automatically, or manually from a remote location, expensive manual field tests can be eliminated without affecting system availability

Reduced Maintenance Costs
With comprehensive data logging during partial valve stroke testing, potential valve failures can be identified long before they become critical and affect normal process operation, endanger plant personnel or result in damage to equipment or the environment. Analysis of the logged data allows operators to implement cost effective predictive maintenance programs and avoid unnecessary maintenance activities

System Failure Alarm
In the event that a valve fails to move during a partial valve stroke test, the test is immediately aborted and an alarm generated

Robust, Compact & Cost Effective
The PST Controller is supplied as part of a fully manifolded hydraulic SIS valve automation system. The fully manifolded system reduces the likelihood of hydraulic leakage through poorly installed hydraulic tubing connections and/or through exposed tubing which is vulnerable to mechanical damage during transit or normal operation